Genesis Model 2 controller bus issuses

[abeaver]

So a month or two ago I bought a Sega Genesis with a Sega CD for $100 on an impulse, which is something I never do. I always wanted a Sega CD, and all my prior Genesis were busted (or so I had thought), so I figured $100 wasn't too bad. However, I ran into a problem that I never noticed before. When I start up a game, up on the dpad is disabled. I know the controller isn't broken, because when I take it out and plug it in again, another button is disabled instead, seemingly at random. Other than that and a broken LED, the Genesis and Sega CD function well. Anyone know what the culprit may be?

Luckily for me, a model 1 that I thought was broken is fine after I learned that the adapter I was using was AC instead of DC. It has worked fine, but I'm worried that I shortened it's life by stupidly using a NES adapter.

[Hobie-wan]

You're lucky it didn't just up and die on you. Nintendo was stupid to use a pack that sent AC to the console when pretty much else nothing else did. That's the reason the SNES has a screwy plug in the US, so people didn't just leave the brick in the wall and swap in their shiny new SNES where their NES was plugged in and blow it up. I'm sure some people killed their GEN 1s with a NES brick. Never use a US NES brick for anything but a US NES. However you can use a GEN 1 brick on a NES safely with no issues.

[abeaver]

Yeah, I'm glad I know that now. My consoles are rather resilient. My SNES, old Genesis 2, and Dreamcast were all flooded with water a while ago when my roof sprung a leak right where I had my TV hooked up. The SNES was literally filled with water. I carefully drained and dried them and let them sit for a few days. They all worked, except the Genesis 2 died a while after.